1 module ApiTemplateOverride
2 def allowed_to_render?(fieldset, field, model, options)
5 options[:select].include? field.to_s
12 class ActsAsApi::ApiTemplate
13 prepend ApiTemplateOverride
17 require 'record_filters'
19 class ApplicationController < ActionController::Base
20 include CurrentApiClient
21 include ThemesForRails::ActionController
28 ERROR_ACTIONS = [:render_error, :render_not_found]
30 before_filter :respond_with_json_by_default
31 before_filter :remote_ip
32 before_filter :load_read_auths
33 before_filter :require_auth_scope, except: ERROR_ACTIONS
35 before_filter :catch_redirect_hint
36 before_filter(:find_object_by_uuid,
37 except: [:index, :create] + ERROR_ACTIONS)
38 before_filter :load_limit_offset_order_params, only: [:index, :contents]
39 before_filter :load_where_param, only: [:index, :contents]
40 before_filter :load_filters_param, only: [:index, :contents]
41 before_filter :find_objects_for_index, :only => :index
42 before_filter :reload_object_before_update, :only => :update
43 before_filter(:render_404_if_no_object,
44 except: [:index, :create] + ERROR_ACTIONS)
48 attr_accessor :resource_attrs
51 rescue_from(Exception,
52 ArvadosModel::PermissionDeniedError,
53 :with => :render_error)
54 rescue_from(ActiveRecord::RecordNotFound,
55 ActionController::RoutingError,
56 ActionController::UnknownController,
57 AbstractController::ActionNotFound,
58 :with => :render_not_found)
61 def default_url_options
62 if Rails.configuration.host
63 {:host => Rails.configuration.host}
70 @objects.uniq!(&:id) if @select.nil? or @select.include? "id"
71 if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
72 @objects.each(&:eager_load_associations)
78 render json: @object.as_api_response(nil, select: @select)
82 @object = model_class.new resource_attrs
85 if @object.respond_to? :name and params[:ensure_unique_name]
86 # Record the original name. See below.
87 name_stem = @object.name
95 rescue ActiveRecord::RecordNotUnique => rn
96 # Dig into the error to determine if it is specifically calling out a
97 # (owner_uuid, name) uniqueness violation. In this specific case, and
98 # the client requested a unique name with ensure_unique_name==true,
99 # update the name field and try to save again. Loop as necessary to
100 # discover a unique name. It is necessary to handle name choosing at
101 # this level (as opposed to the client) to ensure that record creation
102 # never fails due to a race condition.
103 if rn.original_exception.is_a? PG::UniqueViolation
104 # Unfortunately ActiveRecord doesn't abstract out any of the
105 # necessary information to figure out if this the error is actually
106 # the specific case where we want to apply the ensure_unique_name
107 # behavior, so the following code is specialized to Postgres.
108 err = rn.original_exception
109 detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
110 if /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
111 logger.error "params[:ensure_unique_name] is #{params[:ensure_unique_name]}"
112 if params[:ensure_unique_name]
115 @object.name = "#{name_stem} (#{counter})"
129 attrs_to_update = resource_attrs.reject { |k,v|
130 [:kind, :etag, :href].index k
132 @object.update_attributes! attrs_to_update
141 def catch_redirect_hint
143 if params.has_key?('redirect_to') then
144 session[:redirect_to] = params[:redirect_to]
149 def render_404_if_no_object
150 render_not_found "Object not found" if !@object
154 logger.error e.inspect
155 if e.respond_to? :backtrace and e.backtrace
156 logger.error e.backtrace.collect { |x| x + "\n" }.join('')
158 if (@object.respond_to? :errors and
159 @object.errors.andand.full_messages.andand.any?)
160 errors = @object.errors.full_messages
161 logger.error errors.inspect
165 status = e.respond_to?(:http_status) ? e.http_status : 422
166 send_error(*errors, status: status)
169 def render_not_found(e=ActionController::RoutingError.new("Path not found"))
170 logger.error e.inspect
171 send_error("Path not found", status: 404)
176 def send_error(*args)
177 if args.last.is_a? Hash
182 err[:errors] ||= args
183 err[:error_token] = [Time.now.utc.to_i, "%08x" % rand(16 ** 8)].join("+")
184 status = err.delete(:status) || 422
185 logger.error "Error #{err[:error_token]}: #{status}"
186 render json: err, status: status
189 def find_objects_for_index
190 @objects ||= model_class.readable_by(*@read_users)
191 apply_where_limit_order_params
194 def apply_filters model_class=nil
195 model_class ||= self.model_class
196 ft = record_filters @filters, model_class
197 if ft[:cond_out].any?
198 @objects = @objects.where('(' + ft[:cond_out].join(') AND (') + ')',
203 def apply_where_limit_order_params *args
206 ar_table_name = @objects.table_name
207 if @where.is_a? Hash and @where.any?
209 @where.each do |attr,value|
210 if attr.to_s == 'any'
211 if value.is_a?(Array) and
212 value.length == 2 and
213 value[0] == 'contains' then
215 model_class.searchable_columns('ilike').each do |column|
216 # Including owner_uuid in an "any column" search will
217 # probably just return a lot of false positives.
218 next if column == 'owner_uuid'
219 ilikes << "#{ar_table_name}.#{column} ilike ?"
220 conditions << "%#{value[1]}%"
223 conditions[0] << ' and (' + ilikes.join(' or ') + ')'
226 elsif attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
227 model_class.columns.collect(&:name).index(attr.to_s)
229 conditions[0] << " and #{ar_table_name}.#{attr} is ?"
231 elsif value.is_a? Array
232 if value[0] == 'contains' and value.length == 2
233 conditions[0] << " and #{ar_table_name}.#{attr} like ?"
234 conditions << "%#{value[1]}%"
236 conditions[0] << " and #{ar_table_name}.#{attr} in (?)"
239 elsif value.is_a? String or value.is_a? Fixnum or value == true or value == false
240 conditions[0] << " and #{ar_table_name}.#{attr}=?"
242 elsif value.is_a? Hash
243 # Not quite the same thing as "equal?" but better than nothing?
246 conditions[0] << " and #{ar_table_name}.#{attr} ilike ?"
247 conditions << "%#{k}%#{v}%"
253 if conditions.length > 1
254 conditions[0].sub!(/^1=1 and /, '')
261 unless action_name.in? %w(create update destroy)
262 # Map attribute names in @select to real column names, resolve
263 # those to fully-qualified SQL column names, and pass the
264 # resulting string to the select method.
265 api_column_map = model_class.attributes_required_columns
266 columns_list = @select.
267 flat_map { |attr| api_column_map[attr] }.
269 map { |s| "#{table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
270 @objects = @objects.select(columns_list.join(", "))
273 # This information helps clients understand what they're seeing
274 # (Workbench always expects it), but they can't select it explicitly
275 # because it's not an SQL column. Always add it.
276 # (This is harmless, given that clients can deduce what they're
277 # looking at by the returned UUID anyway.)
280 @objects = @objects.order(@orders.join ", ") if @orders.any?
281 @objects = @objects.limit(@limit)
282 @objects = @objects.offset(@offset)
283 @objects = @objects.uniq(@distinct) if not @distinct.nil?
287 return @attrs if @attrs
288 @attrs = params[resource_name]
289 if @attrs.is_a? String
290 @attrs = Oj.load @attrs, symbol_keys: true
292 unless @attrs.is_a? Hash
293 message = "No #{resource_name}"
294 if resource_name.index('_')
295 message << " (or #{resource_name.camelcase(:lower)})"
297 message << " hash provided with request"
298 raise ArgumentError.new(message)
300 %w(created_at modified_by_client_uuid modified_by_user_uuid modified_at).each do |x|
301 @attrs.delete x.to_sym
303 @attrs = @attrs.symbolize_keys if @attrs.is_a? HashWithIndifferentAccess
310 if current_api_client_authorization
311 @read_auths << current_api_client_authorization
313 # Load reader tokens if this is a read request.
314 # If there are too many reader tokens, assume the request is malicious
316 if request.get? and params[:reader_tokens] and
317 params[:reader_tokens].size < 100
318 @read_auths += ApiClientAuthorization
320 .where('api_token IN (?) AND
321 (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)',
322 params[:reader_tokens])
325 @read_auths.select! { |auth| auth.scopes_allow_request? request }
326 @read_users = @read_auths.map { |auth| auth.user }.uniq
331 respond_to do |format|
332 format.json { send_error("Not logged in", status: 401) }
333 format.html { redirect_to '/auth/joshid' }
340 unless current_user and current_user.is_admin
341 send_error("Forbidden", status: 403)
345 def require_auth_scope
346 if @read_auths.empty?
347 if require_login != false
348 send_error("Forbidden", status: 403)
354 def respond_with_json_by_default
355 html_index = request.accepts.index(Mime::HTML)
356 if html_index.nil? or request.accepts[0...html_index].include?(Mime::JSON)
357 request.format = :json
362 controller_name.classify.constantize
365 def resource_name # params[] key used by client
366 controller_name.singularize
373 def find_object_by_uuid
374 if params[:id] and params[:id].match /\D/
375 params[:uuid] = params.delete :id
377 @where = { uuid: params[:uuid] }
383 find_objects_for_index
384 @object = @objects.first
387 def reload_object_before_update
388 # This is necessary to prevent an ActiveRecord::ReadOnlyRecord
389 # error when updating an object which was retrieved using a join.
390 if @object.andand.readonly?
391 @object = model_class.find_by_uuid(@objects.first.uuid)
395 def load_json_value(hash, key, must_be_class=nil)
396 if hash[key].is_a? String
397 hash[key] = Oj.load(hash[key], symbol_keys: false)
398 if must_be_class and !hash[key].is_a? must_be_class
399 raise TypeError.new("parameter #{key.to_s} must be a #{must_be_class.to_s}")
404 def self.accept_attribute_as_json(attr, must_be_class=nil)
405 before_filter lambda { accept_attribute_as_json attr, must_be_class }
407 accept_attribute_as_json :properties, Hash
408 accept_attribute_as_json :info, Hash
409 def accept_attribute_as_json(attr, must_be_class)
410 if params[resource_name] and resource_attrs.is_a? Hash
411 if resource_attrs[attr].is_a? Hash
412 # Convert symbol keys to strings (in hashes provided by
414 resource_attrs[attr] = resource_attrs[attr].
415 with_indifferent_access.to_hash
417 load_json_value(resource_attrs, attr, must_be_class)
422 def self.accept_param_as_json(key, must_be_class=nil)
423 prepend_before_filter lambda { load_json_value(params, key, must_be_class) }
425 accept_param_as_json :reader_tokens, Array
429 :kind => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
434 :items => @objects.as_api_response(nil, {select: @select})
436 if @objects.respond_to? :except
437 @object_list[:items_available] = @objects.
438 except(:limit).except(:offset).
439 count(:id, distinct: true)
441 render json: @object_list
445 # Caveat: this is highly dependent on the proxy setup. YMMV.
446 if request.headers.has_key?('HTTP_X_REAL_IP') then
447 # We're behind a reverse proxy
448 @remote_ip = request.headers['HTTP_X_REAL_IP']
450 # Hopefully, we are not!
451 @remote_ip = request.env['REMOTE_ADDR']
455 def self._index_requires_parameters
457 filters: { type: 'array', required: false },
458 where: { type: 'object', required: false },
459 order: { type: 'array', required: false },
460 select: { type: 'array', required: false },
461 distinct: { type: 'boolean', required: false },
462 limit: { type: 'integer', required: false, default: DEFAULT_LIMIT },
463 offset: { type: 'integer', required: false, default: 0 },
467 def client_accepts_plain_text_stream
468 (request.headers['Accept'].split(' ') &
469 ['text/plain', '*/*']).count > 0
474 response = opts.first[:json]
475 if response.is_a?(Hash) &&
477 Thread.current[:request_starttime]
478 response[:_profile] = {
479 request_time: Time.now - Thread.current[:request_starttime]
487 return Rails.configuration.arvados_theme